Slow operations are prohibited on EDT when creating structure view

[sentry-io]

Sentry Issue: ASCIIDOC-INTELLIJ-PLUGIN-7AV

java.lang.Throwable: Slow operations are prohibited on EDT. See SlowOperations.assertSlowOperationsAreAllowed javadoc.
    at com.intellij.openapi.diagnostic.Logger.error(Logger.java:376)
    at com.intellij.util.SlowOperations.assertSlowOperationsAreAllowed(SlowOperations.java:106)
    at com.intellij.workspaceModel.core.fileIndex.impl.WorkspaceFileIndexDataImpl.ensureIsUpToDate(WorkspaceFileIndexDataImpl.kt:142)
    at com.intellij.workspaceModel.core.fileIndex.impl.WorkspaceFileIndexDataImpl.getFileInfo(WorkspaceFileIndexDataImpl.kt:87)
    at com.intellij.workspaceModel.core.fileIndex.impl.WorkspaceFileIndexImpl.getFileInfo(WorkspaceFileIndexImpl.kt:245)
    at com.intellij.openapi.roots.impl.ProjectFileIndexImpl.isUnderIgnored(ProjectFileIndexImpl.java:76)
    at com.intellij.openapi.roots.impl.ProjectFileIndexFacade.isUnderIgnored(ProjectFileIndexFacade.java:71)
    at com.intellij.psi.impl.file.impl.FileManagerImpl.isExcludedOrIgnored(FileManagerImpl.java:436)
    at com.intellij.psi.impl.file.impl.FileManagerImpl.findDirectoryImpl(FileManagerImpl.java:422)
    at com.intellij.psi.impl.file.impl.FileManagerImpl.findDirectory(FileManagerImpl.java:415)
    at com.intellij.psi.impl.PsiManagerImpl.findDirectory(PsiManagerImpl.java:175)
    at com.intellij.psi.AbstractFileViewProvider.shouldCreatePsi(AbstractFileViewProvider.java:89)
    at com.intellij.psi.SingleRootFileViewProvider.createFile(SingleRootFileViewProvider.java:144)
    at com.intellij.psi.SingleRootFileViewProvider.getPsiInner(SingleRootFileViewProvider.java:101)
    at com.intellij.psi.AbstractFileViewProvider.getPsi(AbstractFileViewProvider.java:185)
    at com.intellij.psi.impl.file.impl.FileManagerImpl.areViewProvidersEquivalent(FileManagerImpl.java:552)
    at com.intellij.psi.impl.file.impl.FileManagerImpl.shouldResurrect(FileManagerImpl.java:649)
    at com.intellij.psi.impl.file.impl.FileManagerImpl.evaluateValidity(FileManagerImpl.java:617)
    at com.intellij.psi.impl.file.impl.FileManagerImpl.evaluateValidity(FileManagerImpl.java:602)
    at com.intellij.psi.impl.source.PsiFileImpl.isValid(PsiFileImpl.java:161)
    at com.intellij.ide.projectView.impl.nodes.PsiTreeAnchorizer.lambda$createAnchor$0(PsiTreeAnchorizer.java:20)
    at com.intellij.openapi.application.impl.RwLockHolder.runReadAction(RwLockHolder.kt:289)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:850)
    at com.intellij.openapi.application.ReadAction.compute(ReadAction.java:65)
    at com.intellij.ide.projectView.impl.nodes.PsiTreeAnchorizer.createAnchor(PsiTreeAnchorizer.java:19)
    at com.intellij.ide.structureView.impl.common.PsiTreeElementBase.<init>(PsiTreeElementBase.java:26)
    at org.asciidoc.intellij.structureView.AsciiDocStructureViewElement.<init>(AsciiDocStructureViewElement.java:26)
    at org.asciidoc.intellij.structureView.AsciiDocStructureViewModel.<init>(AsciiDocStructureViewModel.java:15)
    at org.asciidoc.intellij.structureView.AsciiDocStructureViewFactory$1.createStructureViewModel(AsciiDocStructureViewFactory.java:24)
    at com.intellij.ide.structureView.TreeBasedStructureViewBuilder.createStructureView(TreeBasedStructureViewBuilder.java:33)
    at com.intellij.ide.impl.StructureViewWrapperImpl$rebuildImpl$2.invokeSuspend(StructureViewWrapperImpl.kt:392)
    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)

...
(95 additional frame(s) were not displayed)

[ahus1]

Moving this to outside of the EDT and calculating the entries eagerly in the background. Fixed in next release.